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Nitro Ring and Pinions Ford 9.75in 12 Bolt

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Whether you are looking for a higher gear ratio to improve fuel economy by lowering RPM's, or wanting a lower gear ratio to match up your oversized tires, Nitro Gear & Axle has you covered.  Nitro Ring & Pinions are among the best in the industry.  By using better materials, machining, heat treating and lapping processes, Nitro can ensure a strong, quiet-running, long-lasting setup.  Every new application is put through multi-point inspections and actually installed and set up by Nitro's in-house differential experts to ensure excellent fitment and easy setup.  At Nitro we strive to meet consumer demand for new ratios and applications, and we are continually developing new products to stay ahead of the competition.

  • Precision machining & heat treating processes ensure strength and excellent fitment
  • Computer controlled fine gear lapping ensures ease of installation, excellent contact patters, and a quiet-running setup
  • Rapidly growing application range to meet new demands
  • Street or strip, track or trail - you can depend on Nitro!
  • NOTE:  4.88 Ratio will require a notched cross pin or grinding.

Nitro Gear & Axle

Ring and Pinion Options

Ford 9-3/4" 12 Bolt

1997-2008 Ford F-150 with 9.75" (as opposed to 8.8")
1997-2008 Ford E-150 with 9.75" (as opposed to 8.8")
1997-2008 Ford Expedition with 9.75" (as opposed to 8.8")

Nitro Ring and Pinions Ford 9.75in 12 Bolt is not vehicle specific.